GB597577A - Improvements in bases for electric discharge devices such as electric discharge lamps - Google Patents
Improvements in bases for electric discharge devices such as electric discharge lampsInfo
- Publication number
- GB597577A GB597577A GB19813/44A GB1981344A GB597577A GB 597577 A GB597577 A GB 597577A GB 19813/44 A GB19813/44 A GB 19813/44A GB 1981344 A GB1981344 A GB 1981344A GB 597577 A GB597577 A GB 597577A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lead
- aperture
- wire
- glass bead
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/32—Seals for leading-in conductors
- H01J5/40—End-disc seals, e.g. flat header
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
- H01J2893/0034—Lamp bases
- H01J2893/0035—Lamp bases shaped as flat plates, in particular metallic
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
597,577. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 13, 1944, No. 19813. Convention date, Oct. 14, 1943. [Class 39 (i)] The base structure of an electron discharge device such as a fluorescent lamp comprises a metal plate 18, Fig. 1, sealed direct to one end of the vitreous envelope 10 and having an aperture 23 therein through which a lead-in wire 76 extends, a .glass bead 25 fused to the plate 18 around the edges of the aperture 23, a metal contact disc or cap 26 connected to the lead-in wire 16 and fusion-sealed to the glass bead 25, and a well or cavity 14 housing an exhaust tube 21. The glass bead 25 may itself seal the aperture 23; as shown ; alternatively, the glass bead may be in the form of a hollow ring 60, Fig. 11, in which case the contact disc 26 serves to seal the aperture 23. Preferably, in either form, the metal plate 18 has two lead-in wire apertures 23, symmetrically arranged on either side of the well or cavity 14 housing the exhaust tube 21, as shown in Figs. 1 and 11. The envelope 10 may be of circular, elliptical or flattened elliptical cross-section, the metal plate 18 being correspondingly shaped. The metal plate 18 and contact discs 26 may be of the chrome-ironalloy " Alleghany 55." The method of assembly of the base structures is described in detail. The Specification as open to inspection under Sect. 91 describes an arrangement in which the base-plate 63, Fig. 16 (Cancelled), has only one aperture located centrally therein, through which a lead-in wire 65 attached to a contact disc 26 is sealed by means of a glass bead 25. The exhaust aperture 67 is closed by an. exhaust tube tip 68. The electrode 66. may be of the " cold starting " hot cathode type as shown ; when, it is of the hot starting " type requiring two lead-in wires, the second lead-in wire may be connected directly to the base-plate 63. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US597577XA | 1943-10-14 | 1943-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB597577A true GB597577A (en) | 1948-01-29 |
Family
ID=22025017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19813/44A Expired GB597577A (en) | 1943-10-14 | 1944-10-13 | Improvements in bases for electric discharge devices such as electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB597577A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1111732B (en) * | 1957-02-06 | 1961-07-27 | British Thomson Houston Co Ltd | Fluorescent lamp with socket for low-pressure mercury vapor discharge with excessive power consumption |
-
1944
- 1944-10-13 GB GB19813/44A patent/GB597577A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1111732B (en) * | 1957-02-06 | 1961-07-27 | British Thomson Houston Co Ltd | Fluorescent lamp with socket for low-pressure mercury vapor discharge with excessive power consumption |
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